Testing the fuel pump...
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12 Second Club
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From: San Diego, CA
Testing the fuel pump... I am wanting to eliminate the fuel pump as the cause of my missing/hesitation...
How can I check WOT and part throttle fuel pressure ? Just hook up a guauge to the schrader valve on the fuel rail ?
What kind of numbers should I be looking for ?
Thanks ! <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
Bad30th
How can I check WOT and part throttle fuel pressure ? Just hook up a guauge to the schrader valve on the fuel rail ?
What kind of numbers should I be looking for ?
Thanks ! <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
Bad30th
TECH Junkie
Joined: Nov 2001
Posts: 3,987
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From: Melbourne, FL
Re: Testing the fuel pump... Most gauges have a long enough hose that you can snake it back under the back of hood and lay it down or tape it to the windshield to watch while driving.
Like red said, you don't want to see more than ~2psi drop or so...
Like red said, you don't want to see more than ~2psi drop or so...
TECH Fanatic
Joined: Nov 2001
Posts: 1,190
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From: Las Cruces, NM
Re: Testing the fuel pump... You can just hook it up to the rail and you want 58 psi, you may get slight drop of 1 or 2 psi a WOT. If it does drop a lot it could be the pump, the regulator in the tank or a voltage problem.
Gary
Gary
